If there is a way to do this, I haven't figured it out. I have a social media dashboard which displays the user's profile picture in a web page object on the dashboard (via URL action). My tool tips have links to the original post (also via URL action). When users click the link, Tableau assumes that you want to open it in the web page object on the dashboard, which I don't. There should be a way to specify the destination of the URL action.
-->Community Manager update [Ciara Brennan]
Idea marked Released. Refer to URL action improvements in 2019.1